Balancing Equations

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, following the law of conservation of mass.

Front

What does the coefficient in a chemical equation represent?

Back

The coefficient indicates the number of molecules or moles of a substance involved in the reaction.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products to ensure the same number of each type of atom on both sides.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

Balance the equation: __KNO3 --> __KNO2 + __O2

Back

2, 2, 1

Front

Balance the equation: __CH4 + __O2 --> __CO2 + __H2O

Back

1, 2, 1, 2

Front

Balance the equation: __Zn + __HCl --> __ZnCl2 + __H2

Back

1, 2, 1, 1

Front

Balance the equation: __Al + __HCl --> __H2 + __AlCl3

Back

2, 6, 3, 2

Front

What is the purpose of balancing chemical equations?

Back

Balancing chemical equations ensures that the same amount of each element is present before and after the reaction, reflecting the conservation of mass.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change in a reaction.